<template>
   <el-container class="home-container">
     <!--头部区域-->
     <el-header >
       <div>
         <img src="../assets/logo.png" alt="">
         <span>StarFire系统</span>
       </div>
       <el-button type="info" @click="logout">退出</el-button>
     </el-header>
     <!--页面主体区域-->
     <el-container>
       <!--侧边栏-->
       <el-aside :width="isCollapse ? '64px' : '200px'">
         <div class="toggle-button" @click="toggleCollapse">|||</div>
         <!--侧边栏菜单区域-->
         <el-menu background-color="#333744"
                  text-color="#fff"
                  active-text-color="#409EFF"
                  :unique-opened="true"
                  :collapse="isCollapse"
                  :collapse-transition="false"
                  :router="true"
                  :default-active="activePath">
           <!--一级菜单-->
           <el-submenu :index="item.id + ''" v-for="(item, index) in menuList" :key="item.id">
             <!--一级菜单模板区域-->
             <template slot="title">
               <!--图标-->
               <i :class="iconsObj[item.id]"></i>
               <!--文本-->
               <span>{{item.authName}}</span>
             </template>
             <!--二级菜单-->
             <el-menu-item :index="'/' + subItem.path + ''"
                           v-for="subItem in item.children"
                           :key="subItem.id"
                           @click="saveMenuState('/' + subItem.path)">
               <template slot="title">
                 <i class="el-icon-menu"></i>
                 <span>{{subItem.authName}}</span>
               </template>
             </el-menu-item>
           </el-submenu>
         </el-menu>
       </el-aside>
       <!--右边内容主体-->
       <el-main>
        <!-- 路由占位符-->
         <router-view></router-view>
       </el-main>
     </el-container>
   </el-container>
</template>

<script>
export default {
  name: "Home",
  data() {
    return {
      menuList: [], //左侧菜单数据
      iconsObj: {
        '125': 'iconfont icon-user',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao'
      },
      isCollapse: false,
      activePath: ''
    }
  },
  created() {
    this.getMenuList(),
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      //console.log(res)
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menuList = res.data
    },
    // 点击按钮, 切换菜单的折叠展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接激活状态
    saveMenuState(activePath){
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style scoped lang="less">
.home-container{
  height: 100%;
}
.el-header{
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #FFF;
  font-size: 20px;
  > div{
    display: flex;
    align-items: center;
  }
}

.el-aside{
  background-color: #333744;
   .el-menu{
     border-right: none;
   }
}

.el-main{
  background-color: #eeeeee;
}

.iconfont {
  margin-right: 10px;
}

.toggle-button{
  background-color: #4A5064;
  font-size: 10px;
  line-height: 24px;
  color: #FFF;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>